| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef TimingStateMachine_DEFINED |
| #define TimingStateMachine_DEFINED |
| |
| #include "Benchmark.h" |
| #include "SkTArray.h" |
| #include "Timer.h" |
| |
| class SkCanvas; |
| |
| /* |
| * Manages a timer via a state machine. Can be used by modules to time benchmarks |
| * |
| * Clients call nextFrame, and must handle any requests from the timing state machine, specifically |
| * to reset. When kTimingFinished_ParentEvents is returned, then lastMeasurement() will return the |
| * timing and loops() will return the number of loops used to time. |
| * |
| * A client may continue timing the same benchmark indefinitely. To advance to the next |
| * benchmark, the client should call nextBenchmark. |
| */ |
| class TimingStateMachine { |
| public: |
| TimingStateMachine(); |
| |
| enum ParentEvents { |
| kReset_ParentEvents, |
| kTiming_ParentEvents, |
| kTimingFinished_ParentEvents,// This implies parent can read lastMeasurement() and must |
| // reset |
| }; |
| |
| ParentEvents nextFrame(bool preWarmBetweenSamples); |
| |
| /* |
| * The caller should call this when they are ready to move to the next benchmark. |
| */ |
| void nextBenchmark(); |
| |
| /* |
| * When TimingStateMachine returns kTimingFinished_ParentEvents, then the owner can call |
| * lastMeasurement() to get the time |
| */ |
| double lastMeasurement() const { return fLastMeasurement; } |
| |
| int loops() const { return fLoops; } |
| |
| private: |
| enum State { |
| kPreWarm_State, |
| kTiming_State, |
| }; |
| enum InnerState { |
| kTuning_InnerState, |
| kTiming_InnerState, |
| }; |
| |
| int fCurrentFrame; |
| int fLoops; |
| double fLastMeasurement; |
| double fStartTime; |
| State fState; |
| InnerState fInnerState; |
| }; |
| |
| #endif |